Thanks Mikael, I changed the code to
lhh 9,h2 and H2 dc h'2' And now can see the expected value 00000002 00000000 in R9, at least from SNAP, so I'm happy enough. Still odd that Xpediter appears to "step over" it without executing it, but without Xpediter I get the results I expect so I'm good to go in spite of this doubt. Very rusty on Xpediter, may have to RTFM some more... cheers, Peter ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN